Fast growth at low temperature in vacancy-mediated phase separation - art.no. 060102

Citation
C. Castellano et F. Corberi, Fast growth at low temperature in vacancy-mediated phase separation - art.no. 060102, PHYS REV B, 6305(6), 2001, pp. 0102
Citations number
23
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6305
Issue
6
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010201)6305:6<0102:FGALTI>2.0.ZU;2-3
Abstract
We study the phase-separation dynamics of a two-dimensional Ising model whe re A and B particles can only exchange position with a vacancy. In a wide r ange of temperatures the kinetics is dominated, during a long preasymptotic regime, by diffusion processes of particles along domain interfaces. The d ynamical exponent z associated to this mechanism differs from the one usual ly expected for Kawasaki dynamics and is shown to assume different values d epending on temperature and relative AB concentration. At low temperatures, in particular, domains grow as t(1/2), for equal AB volume fractions.